Effecting catalytic hydrogenizations.



OTTO SCHMIDT, OF LUDWIGSHAFEN-ON-TltIE-RHINE, AND HUGO BLANKENHORW, OF

MANNHEIM GERMANY,-. ASSIGNORS TO BADISCHE ANILIN 84 SODA FABRIlL' 0F LUDWIGSHAFEN-ON-THE-IRHINE, GERMANY, A CORPORATIONL nrrncrme onrarirrrc nrmaoenmzarions,

No Drawing.

To aZZ whom it may concern:

'Be it known that We; O'r'ro. SCHMIDT and How BLANKEINHORN, citizens of the .Ger man Empire, residing, respectively, at Lud- Wigshafen-on-the-Rhine and Mannheim, Germany, have invented new and useful Improvements in Effecting Catalytic Hydrogenizations, of which the following is a specification. i

It is known to effect catalytic hydrogenizations by means of hydrogen or gases containing free hydrogen. According to the present invention the catalytic hydrogeniz ations can be performed by employing as reducing gas carbon monoxid in the presence of Water vapor. The latter may be vadded to pure carbon monoxid or to gases containingit and the quantityof the water vapor should be at least one volume for each three volumes of the carbon monoxid. Gases containing carbon monoxiol and hydrogen, such as water gas, or Dowsou gas, may also be used in the presence of water vapor, the reducing action of the hydrogen being increased by the simultaneous action of carbon monoXid and water vapor. The present invention renders it possible to substitute for hydrogen the cheap carbon monoxid or the still cheaper mixtures containing it.

,Hydrogenizations of the most various kinds can be carried out according to the' present process and the reaction takes place already at comparatively low temperatures. In order to illustrate the new process more fully the following example is given, but the invention is'not confined to this example. ,The parts are by weight.

Example' If it is desired to transform nitrobenzene into anilin a vertical cylinder is supplied with a contact mass containing copper, such as it is obtainable by coatin 130 parts of pumice stone with a mixture. of 24s,?) parts of cupric carbonate, 2.? parts of zinc carbonate and 20 parts of a concentrated sodium silicate solution and reducing at a low temperature; through this cylinder is'passed a mixture of vaporized nitrobenzene and an excess of a reducing gas, conta'mlng carbon monoxul, and water vapor in such a proportion. that at least one volume of water vapor is present for each three Application filed May 8, 1915. Serial No. 26,346.

Specification of Letters latent. Patented Aug. 21, 191?.

volumes of carbon monoxid, and a-tempcrature of from 290 to 220 G. is maintained during the reaction. Anilin is produced In a corresponding manner other hydro-- genizatio'n processes can. be carried out andinstead of the described contact mass any other suitable contact-mass can be used.

We claim 1. The process of eiiecting catalytic hydrogenizations consisting; in--t1.'e-ating the substance to be hydrogenated, in thc preconce of a contact mass, with a gas mixture containing carbon no'noxid and at least onevolume, of water vapor, for each three volumes of the carbon monoxid.

2. The process of effecting catalytic hyilrogenizations consisting in treating the substance to be hydrogenated, in-the presence of a contact mass, with ainixture of water gas and at least one volume, of water vapor, for each three volumes of the carbon inonoxid. l

3. The process of producing aromatic 7 ainins by catalytically hydrogenating aromatic nitro compounds consisting in treating an aromatic nil'ro compound in the pres ence of a contact mass, with a gas mixture containing carbon monoXid and'a t least one volumes of the carbon xnonoxidl. The process of producing anilin by cata lytical ly hydrogcnatmg nitrobenzene volume. 'of water vapor, for each three consisting in treating nitrobenzene,'in-the set our hands in the presence. of two subscribing; witnesses. I i

Witnesses PAUL BnL'rzUND, EMILE Hoonr.

'Inioo BLANKENHOR Q Witness WOLFE I 1 f lVI LI BAUST, 

